US100838A - Improvement in cehtrifugal pujtffs - Google Patents

Description

WILLIAM-Daarna ANDREWS, or Vnew Youn, N. r.

Letters Patent No. 100,838, dated March 15, 187.0.

' IMPRQVEMENT 11s CENTRIFUGAL PUMPS.

-T he Schedule referred to in these lieti-.exs Patent` and making part of the saine.

To all whom -it may concern:

Be it known that I, WILLIAM DnAifn-n ANDREWS, of the city, county, and State of New York, have invented anew and useful Improvement in Centrifugal Pumps, of which thefollowiug is a full, clear, 'and exact description, reference being had to the accompanying drawing forming'part of i this specification, andin which- Figure 1 represents a sectional view, ftaken indirectron of the operating-shaft, cfa centrifugal pump, con- Y structed in accordance with rny improvement;4

Figure'2, a face view ofthe interioriofsaid pump,

with the induction-case removed; and

Figure 3, aside view of the propelling-wheel or revolving vane-carrier tosaid pump.

A Figure 4 is 'a similar View to'ig. 1, under a slightly modiiied construction of the working parts yof thepump.

Similar letters of refereneef indicate correspomliug This invention hasfreferenee to pumps whichl operi' atingby centrifugal action, are made up, for the most part, ot a propelling wheel, disk,or vane-carrier, ar-

ranged'to rotate within ajsuitablesbell or chamber, and operating, 'in-'connection with passages of -a spiral -1 v character', t'o direct or divert thel course of the current'.

In the pump or pumps of this character, aspreviously patented to me, in which the .vanes,tl.rat in-rotating produce the suction and `expulsion of the Huid oriluidmass, are arranged only upon the suction ,side or face of their carrying disk or cone,'there is a force-or pressure equal to the head ofthe uid above or at the back, and atmospheric pressure iuducedby the vacuum ore-l ated on the suction side or face of the vane-carrier, thrown upon 'the back of said carrier, which necessitetes a step-bearing on tiresuction side or face of the latter, and which pressures produce much friction and wear, also impair the .effectiveness of the vanes, and,

. by reason of the step-bearing referred to, exclude them from being extended to the center' of the carrier. `These defect, heretofore, I have only been ablein a measure to remedygby giving to the vanes an outward extension, beyond o r in rear of'their carrier, and in close proximity to the stationary eduction-ease or chamber', so that the carrier is somewhat, relieved by the action of the rearv protruding portions of the varies from iiuid pressure at its back, and a partial vacuum.

created on such part or surface. The relief, however, thus, afforded docs not dispense with a step-bearing on the suction side or face of the carrier, and the vanes are restricted to an outer travel around said bearing, which latter often forms a serious obstruction to the passage of the fluid, especially when mixed with foreign substances, such as partially-pulped paper-stock,

' mud, and sand, mixed with shells, roots, 83o., tannin and other substances;r likewise said step adds to the labor of working the pump, by rendering it necessary A to rotate the fluid at a considerable distance from the 4center of the revolving carrier, thereby causing much power' to be consumed in abruptly giving totheluid lthe high velocity due to au outer initial, as contradistinguished from a central initial action of the-'vanas These several objections are removed by this invention, power largely econornized, and the-construction ofthe pump simplilied and clreaperred, as well as its durability enlarged. To this end The invention consists in such a construction of the working partsof the pump as' that, while the vanes are or may be restricted to the suction side 0r face of their revolvingvcarrier, a step-bearing on such side or face may be dispensed with; also, the vanes be arranged to meetic the center' of the carrier, and the latter balanced or supported byireason of a vacuum established on the back of saidcarrier by or through the action'ot' the vanos, as arranged on the ii'ont of it. J Also, tire invention incirrdes, incombination with such or other suitable vane-carrier, a peculiar construction orl arrangement of the eduction passages tor easing the discharge, auddirecting its course toan outlet, which is concentric with the carrier, and from which it may be led .in any desired line or course.

Referring,- in the first instance, to figa-1, 2 and 3 of the accompanying drawing.- 4

A is the induction,-and.B theeduction-case,secured or bolted together, and forming the outer shell of the pump.

The eduction-case B has' an inner case or shell, (l, l

castwith and connected to it by spiral -wings,d, of which 'there' inay be any suitable number, and which are of an increasing pitclras they approach the delivery, and the shells Band O so shaped as to change the course of the current from a tangential .or'rotary one to a'straight'one, occupying a concentric relationship to the' carrier, and at right angles to Atheplane of motion ci' the carrier, the fluid, on entering the eductiomcase, being received from the carrier-vanas nearly in line of their motion.. i

center, iu which the driving-shaft D revolves.

' flo a fiange, c, surrounding the central outlet or eduction-passage of the case B, may be secured a discharge- `bend or elbow, provided with a stuffing-box concentric with the oarricnand through which the operatingshaft'D, having a driving-pulley upon it, may be made to pass into or through an outer bearing, d, on a standard, E, which is attachedtc or forms part of the bedplate F. A. delivery elbow, thus-arranged, may -be turned to discharge in any dir'ection at right angles to the driving-shaft, or thereabouts, from a straight dclivery at the center of the pump, and in the axial line of lits driving-shaft.

r.I his inner shell Ollas a long bearing, '11, through its ferm, may .be attached.

D, and having on its front face anysuitable numberof within the case A, and between it and the inner shel rier, in close proximity to the front orfxee edge of the .extending so asl toenter, in a close manner, without flange!l allows of the adjustment of the carrier G in vthrough which but little water o'riinid can pass from 4 several times greater than that'of the space estab- C, or it may be obtained by passages formed in the The-induction-ease A is provided with a central inlet, e,to which'a suction-pipe, of anydesired length or vGf is the revolving vane-carrier, secured to the shaft wings or vanes,'ff, arranged towel-k closely, but freely 0, but not necessarily extending beyond the latter, though projecting vbeyond the pe'riphery of said carinner shell C.

The carrier G- is formed, at or near its periphery, on its back edge or face, with a projecting annular flange, g, arranged to lie parallel with .the driving-shaft, and

rubbing against oltuchling, thel interior of the shell C, or recess formed in the mouth of the same. This the axial direction of its driving-shaft, w-ithout establishing an objectionable opening or space between said carrier andthe innerl shell, and the samev forming an angular passage 'between the carrier and vsaid shell,

the-induction-case A.

Through the carrier G, as near to thel center thereof asthey can conveniently be placed,are what may be termed vacuum passages, h h, through and by means of which the wings or vanes j' f of the revolving carrier, create and maintain a vacuum within the inner shell O, or upon the back oi' the carrier G, equal to that, or thereabouts, upon the front side or face of the latter.

These passages h h should have a combined area lished by the open or free jointV of the outer portion or periphery of the carrier with thel mouth or interior of the inner shell C.

By this passage connection of the induction chamberA with the interior of the shell C, or s pace at back of the carrier G, the latter is balanced, as it were, by or through the action of the vanes f f, as arranged on front of it, relieving the back -as well as the fiont of the carrier alike of atmospheric and water or fluid pressure. The same result may be obtained, and in a like manner, by means of 'a tube, vas shown byvdotted lines in lig. 1, arranged on the outside of the pump, and made to connect the induction-chamber or its inlet with the back of the carrier or interior of the shell walls of' theinduction-case A and inner shell O, and connecting with each other to produce a like action or eect. Insnch ease or cases the'passages h hmay be dispensed with.

space on back of the carrier, does 4away with the ne,

cessity of a step-bearing to the front ofthe car1ier,or

lany protrusion of its driving-shaft through it, and allows of the wings or vanes f f being extended to meet in the center oi' the carrier, whereby the several ohjeetions hereinbefore named, as incidental to previous arrangements, are obviated.

The combination with the vanes f f of the spirallyvarranged eduction-passagcs, as established bythe wingsv -a and shells B a'nd O, whereby the course of the cur- 'rent is gradually changed, as hereinbefore described,

from a tangential and rotary one to a straight and ax` -ial one at the outletc of the case B, insnresa speedy l relief to and free action for said carrrier, and gives a' compactness of character to the pump. The shell or inner body portion O of the pumpneed not necessarily be hollow, but it is preferred to construct it so. v

While infigs. 1, 2, and 3 the carrier G is shown as of conical form on its face, and the induction-case and propelling-vanes shaped to correspond, in iig. 4 of the drawing said carrier is represented as of disk or iiat form, and the inductioncaseLor vanes shaped or arranged to correspond; but the principle of action is the same, and a similar passage-like connection established through the carrier or between the induction-case and hack ofthe carrier, to keep up a vacuum in rear of' the latter. Various shapes or configurations may, in fact,

be given tothe vane-carrier, also' tothe eduction passages or courses, as regards final delivery of the duid from the pump, without depart-ing from the distinguishing principal feature of this invention,

What is here claimed, and desired to be secured by Letters Patent, is-

1. The combination with the propelling-wheel, having the vanes arranged on the face ci it, of a vacuum passage o'r passages, arranged to establish communication between the induction side of the pump and the back of said wheel or vane-carrier, substantially as and for the purpose or purposes herein set forth.

2. The vanes, arranged to extend to the center of the propelling-wheel, in combination with a vacuum passage or passages between the induction side of the 'pump and back of said wheel, essentially as described.

3. The arrangement, relatively to the propelling-- wheel, of the spiral eduction passages to the pump, substantially asfshownand described.

Witnesses: WM. D. ANDREWS.

Fano. HAYNEs, HENRY PALMER.

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